wp-includes/class-wp-query.php:3768Sets up the current post.
One hook fires while WP_Query::the_post() runs, in this order:
public function the_post() { global $post; if ( ! $this->in_the_loop ) { if ( 'all' === $this->query_vars['fields'] ) { // Full post objects queried. $post_objects = $this->posts; } else { if ( 'ids' === $this->query_vars['fields'] ) { // Post IDs queried. $post_ids = $this->posts; } else { // Only partial objects queried, need to prime the cache for the loop. $post_ids = array_reduce( $this->posts, function ( $carry, $post ) { if ( isset( $post->ID ) ) { $carry[] = $post->ID; } return $carry; }, array() ); } _prime_post_caches( $post_ids, $this->query_vars['update_post_term_cache'], $this->query_vars['update_post_meta_cache'] ); $post_objects = array_map( 'get_post', $post_ids ); } update_post_author_caches( $post_objects ); } $this->in_the_loop = true; $this->before_loop = false; if ( -1 === $this->current_post ) { // Loop has just started. /** * Fires once the loop is started. * * @since 2.0.0 * * @param WP_Query $query The WP_Query instance (passed by reference). */ do_action_ref_array( 'loop_start', array( &$this ) ); } $post = $this->next_post(); // Ensure a full post object is available. if ( 'all' !== $this->query_vars['fields'] ) { if ( 'ids' === $this->query_vars['fields'] ) { // Post IDs queried. $post = get_post( $post ); } elseif ( isset( $post->ID ) ) { /* * Partial object queried. * * The post object was queried with a partial set of * fields, populate the entire object for the loop. */ $post = get_post( $post->ID ); } } // Set up the global post object for the loop. $this->setup_postdata( $post ); }Introduced in 1.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-query.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.